HobbyKing.com New Products Flash Sale
FeiJi's blog
Archive for March, 2012
Posted by FeiJi | Mar 28, 2012 @ 07:52 AM | 3,090 Views
Somewhere on the internet it was suggested to use notebook vinyl for wing tip stabilizers - can't find the reference now but thanks to whoever it was. I tried it and like it because they are indestructible. Mine are just held on by a ponytail bungee and three dowels I epoxied into the wing which also act like bumpers. Ugly but functional - sort of like the Warthog which is getting replaced by the F-35 - sure to disappoint a lot of grunts.

Update 6/4: I have gone finless on all my wings now. They fly great if not better than with fins. Faster, less drag and no fixing broken or fallen off fins. Flight characteristics are not too different.
Posted by FeiJi | Mar 24, 2012 @ 12:49 AM | 2,853 Views
Have had about 6 flights now - think it is still too nose heavy. Have had some wonderful crashes. During the last flight the nuts and bolts holding the motor on vibrated off and you could hear them getting hit by the prop. So based on someone else's idea I used a bit of hard foam and zip ties to mount the motor. Maybe in the next crash some of that energy will be absorbed by the foam.
Beat up but still flying. Flies a little fast for me - easy to let it get too far away.
Posted by FeiJi | Mar 23, 2012 @ 01:18 AM | 3,553 Views
Bolted keychain camera to my hat so it won't move around and then maybe I can aim it a little more consistently. Sandwiched a little velcro to keep it pointing straight ahead. Now I can see the camera and line it up with my glasses in the same place everytime.
Ps - I was having a lot of trouble uploading/downloading from my camera to my pc until I formatted the camera with Windows. Since then I have had no problems with camera. I think I have an old #3.

Other learning points:
- read, copy and delete files from the memory card with a reader. Do not use the camera connected to the pc to perform these functions as it may lock up the camera.
- sometimes deleted files will go into a trash file on the memory card. Be sure to delete the trash file or the card will be full.
- occasionally I have to format the card to get back all of the space.
Posted by FeiJi | Mar 20, 2012 @ 07:24 AM | 3,010 Views
I finally finished my delta wing and made a few flights. The first couple lasted a couple minutes but my hatcam was pointing off into space. I am trying to learn how to aim it. My wing flew nicely but have not trimmed it out yet and a little wind blows it around pretty good plus I just can't fly very well yet - only 4 hours total air time. Anyway, pretty funny landings.

I will continue to work on this plane and post some good flights as I get them.

X45WL Delta RC Foam Wing (1 min 28 sec)

Posted by FeiJi | Mar 20, 2012 @ 01:44 AM | 3,668 Views
Got this SmartSensor anemometer for 12 bucks so I don't have to guess the speed of the wind anymore. Unfortunately, only in China as far as I know. I am in China and ordered it off www.taobao.com - not sure if they ship directly to US.
Posted by FeiJi | Mar 17, 2012 @ 02:59 AM | 2,998 Views
I finally bought a keychain camera and mounted it on my 32" Bluecor Wing because I was interested in finding out what the controls were doing. Got it flying once around the stadium then brought it in kind of drastically. Lots of wind between the buildings. Servos were really chattering until the wing gets away from my TX. I now have a real radio.
Got lucky with the first landing. Second one wasn't so good.
BCWing Keychain Camera Test.avi (2 min 56 sec)

Posted by FeiJi | Mar 09, 2012 @ 12:40 AM | 3,437 Views
Started working on airframe of my first design. Copy of X-45c silhouette and using the wing design of the Blucor Wing and reinforced with internal wooden rods so the nose shouldn't get crushed.

This delta wing is kind of a hybrid airfoil and step combined.

About ready for the electronics which are on order. Won't take long to finish it but may have to wait for better weather to maiden, lots of wet snow on the ground.

Used TLAR measurement system.

Dimensions:
chord: 47 cm
wingspan: 66 cm
width of wing: 1.5 cm
cg: from 22.5 to 25.5 cm

Have no idea if it will fly or what flight characteristics may be but sure is fun finding out.

Updated 3/17: photos of motor mount I made of aluminum and showing XXD (Mystery motor I think) A1510 2200kv motor I plan to use with 5 inch prop. Motor mount is about 9 grams, a little heavier than wood but I got tired of breaking mounts.

Updated 3/18: finished plane, ready to maiden. Craftsmanship is quite not existant, kind of kluged together. AUW is 240 grams. Portly but I like some weight as its pretty windy these days around here. Going to use 500 3s lipo.
CG is around 26 cm from nose if I used the cg program correctly. Glides on my bed ok. I think it might be nice to add a piece to cover the electronics but don't know how to do it.

Updated 3/21: have had 4 flights now and I can handle it very easily in no wind but in blustery conditions I lose control. Crashed it...Continue Reading
Posted by FeiJi | Mar 05, 2012 @ 07:17 PM | 2,677 Views
Thought I would post a few thoughts, experiences for own record as I learn to build and fly rc craft.
Started to learn to fly last fall with a couple of cheap Chinese planes and radios and kind of got hooked on it. Started with those directional thrust twin engine planes and what a thrill when I got one to stay in air for a full battery.
Then started building foam planes, Flying Saucer, Nutball, and 1B1M delta. Scavenged a Cessna kit for the parts and radio (still haven't flown the Cessna).

Latest project is the BlueCor Wing and have built two of them and when I got the first one finally flying after a bunch of fiascos, I was elated.

Not sure why I want to fly, seems a strange hobby for an adult to get into so late in life. In the last few years (at age 55) I took up the unicycle and glad I have done so but it seems to pale compared to the thrill I get from controlling in the air something I have built.
Anyway, I hope to revisit this strange compulsion to fly and resolve it. Some hobbies I am involved with, I seem to love the idea more than the doing - but with flying planes I love both the idea, the building and the doing.

Have posted a few threads and replies on this forum but I don't seem to be very good at interacting with others here so will just go this route.

Right now am waiting for an order of new batteries. My only 2 900 3s are pretty much balls of lipo goo and can't hold more than a couple minutes of charge - wont balance anymore. Also I need to order some...Continue Reading